Make panels not show on top when there is an app running in full screen mode.

chrome/browser/ui/panels/panel.h

Index: chrome/browser/ui/panels/panel.h
diff --git a/chrome/browser/ui/panels/panel.h b/chrome/browser/ui/panels/panel.h
index 05533c9dab20257fa64290bf2f0e62b48e277476..c8f3afd241df4e3399342b048ff7c7f2f2dde05b 100644
--- a/chrome/browser/ui/panels/panel.h
+++ b/chrome/browser/ui/panels/panel.h
@@ -63,6 +63,13 @@ class Panel : public BrowserWindow,
 
   bool IsDrawingAttention() const;
 
+  // This function will only get called by PanelManager when full screen mode
+  // changes i.e it gets called when an app goes into full screen mode or when
+  // an app exits full screen mode. Panel should respond by making sure
+  // a) it does not go on top when some app enters full screen mode.
+  // b) it remains on top when an app exits full screen mode.
+  void FullScreenModeChanged(bool is_full_screen);
+
   // BrowserWindow overrides.
   virtual void Show() OVERRIDE;
   virtual void ShowInactive() OVERRIDE;